Tiny home rules in Columbia, TN — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Tennessee enforces the International Residential Code with Appendix Q for tiny houses statewide, setting minimum construction standards local governments cannot weaken.
Tennessee adopted the 2018 International Residential Code with state amendments under the State Fire Marshal's authority through TCA Title 68, Chapter 120. Appendix Q of the IRC governs tiny houses 400 square feet or less and sets minimum standards for ceiling heights, lofts, ladders, and emergency escape openings. Local governments enforcing building codes must apply these minimums and cannot lower them. Tiny homes on permanent foundations are dwellings; those on wheels are typically classified as recreational vehicles or park model RVs subject to different rules. The state code applies to all residential construction in jurisdictions that have adopted building codes.
Construction without permits or below code minimums triggers stop-work orders, fines, and required corrections before occupancy.
See how Columbia's tiny homes rules stack up against other locations.
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